CN1962825A - Process for lowering solidifying point of bio-diesel oil - Google Patents
Process for lowering solidifying point of bio-diesel oil Download PDFInfo
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- CN1962825A CN1962825A CNA2006101620702A CN200610162070A CN1962825A CN 1962825 A CN1962825 A CN 1962825A CN A2006101620702 A CNA2006101620702 A CN A2006101620702A CN 200610162070 A CN200610162070 A CN 200610162070A CN 1962825 A CN1962825 A CN 1962825A
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- biofuel
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- biodiesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
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Abstract
The invention discloses a reducing method of solidifying point of biological diesel, which comprises the following steps: 1. adopting biological diesel as raw material; preheating the biological diesel; cooling the biological diesel; crystallizing the high-solidifying point component in the biological diesel; culturing crystal; making crystal grow; 2. separating solid from liquid to obtain crystal component; generating low-solidifying point biological diesel; circulating the step 1 and step 2 once or many times to obtain the product.
Description
Technical field
The present invention relates to a kind of method of obtaining the high quality biomass fuel, relate in particular to a kind of method that reduces freezing point of biodiesel.
Background technology
Biomass fuel is the general name by organic combustiblematerials of photosynthesis generation, is a kind of renewable energy source.The development and use of biomass fuel can not only alleviating energy crisis, reduces the dependence to mineral fuel, and can alleviate environmental pollution.At present, the development and use of biomass fuel have become the common recognition of countries in the world.Biofuel is to utilize animal-plant oil, waste cooking oil, acidifying oil, the trench wet goods waste grease of double-low rapeseed oil, soybean oil, plam oil, xylophyta oil and other kind to be raw material, and what make is the regeneratable liquors biomass fuel of a kind of " safety, cleaning, efficient " major ingredient, that can use for oil engine with the fatty acid methyl ester admixture, is typical " green energy resource ".Biofuel is better than mineral diesel aspect environmental characteristics, have good emission behavior; And because its oxygen level height, amount of oxygen required in combustion processes is few than mineral diesel, and ignition characteristic is better than ordinary diesel oil.In addition, existing diesel motor needn't be done any change and can use biofuel, is convenient to very much promoting the use of of biofuel.
In the quality index of biofuel, zero pour is a very important index, if envrionment temperature is lower than the zero pour of biofuel, biofuel will can not flow because of solidifying, and also just can't normally use.The height of freezing point of biodiesel is that saturated fatty acid methyl ester content is low more by the decision of the height of saturated fatty acid methyl ester in the biofuel, and the zero pour of biofuel is just low more.At present, the zero pour of the biofuel of selling on the market is normally at 3 ℃ to 15 ℃, and is generally higher, and the use of high-solidification point biofuel is subjected to the influence of envrionment temperature very big, and the ideal freezing point of biodiesel should be equal to or less than 0 ℃.And these biofuel are owing to be to originate from various animal-plant oil, and its saturated fatty acid methyl ester content exists very big difference, causes its zero pour to differ greatly, and is unsuitable for very much promoting the use of of biofuel.
For reducing the zero pour of biofuel, present research all is that the pour point depressant of existing application in petrifaction diesel added in the biofuel, to reduce the zero pour of biofuel.But,, be applicable to the pour point depressant of petrifaction diesel and be not suitable for biofuel because petrifaction diesel and biofuel are two kinds of diverse materials of chemical structure.Up to the present, also do not find a kind of pour point depressant in biofuel, to play ideal pour point depression effect.Newly developed or discovery is applicable to that the pour point depressant of biofuel also needs to do a large amount of work and spend a large amount of time (pour point depressant that makes new advances is found or developed to needs, and need a large amount of examinations), is not the thing that overnight can finish.
Summary of the invention
The purpose of this invention is to provide a kind of method that reduces freezing point of biodiesel.
The technical scheme that realizes the object of the invention is; A kind of method that reduces freezing point of biodiesel has following steps: 1. be raw material with the biofuel, earlier described biofuel cooled off, make the higher component crystallization of zero pour in the described biofuel; 2. carry out solid-liquid separation then, isolate crystal composition, and obtain liquid subzero biofuel.
Before to described biofuel crystallisation by cooling, the higher component of zero pour is that nucleus carries out crystallization with the tiny crystal grains that has existed in the biofuel in the described biofuel in order to avoid, can also carry out the step of preheating, so that the tiny crystal grains that has existed in described biofuel fusing, thereby when crystallisation by cooling, the higher component of zero pour can be with the crystallization of ideal rule in the described biofuel.
Before carrying out solid-liquid separation, also have growing the grain and handle the step that crystal is fully grown up.
Behind the liquid composition heat temperature raising that obtains after the solid-liquid separation, repeat again above-mentioned steps 1., 2. one or many, can obtain the lower biofuel of zero pour.
The solid-liquid separation method of above-mentioned steps described in 2. is for adopting filtering mode.
Described preheating is for being that medium heats with steam in plate-type heat exchanger; Described crystallisation by cooling is to carry out in the crystallizer of band whipping appts and spiral coil cooling tube and cooling jacket; Described growing the grain is treated in the maturator of band whipping appts and spiral coil cooling tube and cooling jacket and carries out.
The preheating temperature of described preheating is 45 ℃ to 60 ℃; Rate of cooling during described crystallisation by cooling is 1 ℃/min to 2 ℃/min, and stirring velocity is 10 rev/mins to 15 rev/mins, and final crystallisation by cooling temperature is subzero 5 ℃ to 7 ℃ above freezing; The growing the grain temperature that described growing the grain is handled is subzero 5 ℃ to 7 ℃, and stirring velocity is 10 rev/mins to 15 rev/mins, and rearing crystal time is 8 hours to 24 hours.
Described filtration is to adopt membrane pressure filter or belt vacuum filter to filter.
When using membrane pressure filter: filter pressure is 0.2Mpa to 1.5Mpa, and filtration time is 13 minutes to 15 minutes, when using belt vacuum filter; Vacuum tightness is 350Pa to 450Pa, and filtration time is 15 minutes to 40 minutes.
Positively effect of the present invention is: reprocess biofuel by present method (1), can reduce the zero pour of biofuel, and use problem the winter that has solved biofuel, has enlarged the territory of use and the duration of service of biofuel.(2) method of reduction freezing point of biodiesel of the present invention is the biofuel that various animal-plant oil and various waste grease are produced, the difference on zero pour according to saturated fatty acid methyl ester component and non-saturated fatty acid methyl esters component, the method that adopts the low temperature branch to carry reduces the zero pour of biofuel, therefore, use various animal-plant oil and various waste grease biofuel as raw material production, can both be used for preparing subzero biofuel, need not select the quality of the biofuel used as the inventive method raw materials for production, thereby production cost is low, the efficient height.(3) by present method biofuel is reprocessed, can promote and unify all kinds of biodiesel qualities of existing production of biodiesel manufacturer production, help the popularization of biofuel.(4) present method is a physics production process; do not use any pharmaceutical chemicals; present method is when obtaining the low-freezing biofuel; can obtain a kind of byproduct: the high-solidification point biofuel, can use at southern area or in the summer of northern area, thereby; all components that method of the present invention produced all are value products; not producing any waste, without any pollution, is a kind of production method of very environmental protection to environment.
Description of drawings
Fig. 1 is the technological process block-diagram of the method for reduction freezing point of biodiesel of the present invention;
Fig. 2 is another technological process block-diagram of the method for reduction freezing point of biodiesel of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, but be not limited to this.
(embodiment 1)
The method of the reduction freezing point of biodiesel of present embodiment has following steps:
1. be that 8 ℃ biofuel is a raw material with zero pour, this biofuel is carried out crystallisation by cooling in the crystallizer of band whipping appts and spiral coil cooling tube and cooling jacket, and make the high-solidification point substance crystallization that comprises various saturated fatty acid methyl esters in the described biofuel; Rate of cooling during crystallisation by cooling is 1 ℃/min, and stirring velocity is 10 rev/mins, and final crystallisation by cooling temperature is subzero 5 ℃;
2. the material behind the crystallisation by cooling adopts membrane pressure filter to carry out filtration treatment, and filter pressure is 0.2Mpa, and filtration time is 13 minutes, and by filtration treatment, obtaining liquid zero pour is subzero 1 ℃ biofuel.
(embodiment 2)
The method of the reduction freezing point of biodiesel of present embodiment has following steps:
1. be that 10 ℃ biofuel is a raw material with zero pour, is that medium carry out preheating with steam with this biofuel in plate-type heat exchanger, preheating temperature is 50 ℃, in the crystallizer of band whipping appts and spiral coil cooling tube and cooling jacket, carry out crystallisation by cooling then, and make the high-solidification point substance crystallization that comprises various saturated fatty acid methyl esters in the described biofuel; Rate of cooling during crystallisation by cooling is 1.5 ℃/min, and stirring velocity is 14 rev/mins, and final crystallisation by cooling temperature is subzero 8 ℃;
2. the material behind the crystallisation by cooling adopts membrane pressure filter to carry out filtration treatment, and filter pressure is 1.2Mpa, and filtration time is 13 minutes, and by filtration treatment, obtaining liquid zero pour is subzero 5 ℃ biofuel.
(embodiment 3)
As shown in Figure 1, the method for the reduction freezing point of biodiesel of present embodiment has following steps:
1. being that 3 ℃ biofuel is a raw material with zero pour, is that medium carry out preheating with steam with this biofuel in plate-type heat exchanger, and preheating temperature is 45 ℃;
2. with step 1. the biofuel after the preheating in the crystallizer of band whipping appts and spiral coil cooling tube and cooling jacket, carry out crystallisation by cooling, and make the high-solidification point substance crystallization that comprises various saturated fatty acid methyl esters in the described biofuel; Rate of cooling during crystallisation by cooling is 1 ℃/min, and stirring velocity is 15 rev/mins, and final freezing and crystallizing temperature is subzero 5 ℃;
3. with step 2. the material behind the crystallisation by cooling place the maturator growing the grain of band whipping appts and spiral coil cooling tube and cooling jacket to handle, crystal is grown up; The growing the grain temperature is subzero 5 ℃, and stirring velocity is 10 rev/mins, and rearing crystal time is 8 hours;
4. the material after growing the grain being handled adopts membrane pressure filter to carry out filtration treatment, and filter pressure is 0.2Mpa, and filtration time is 13 minutes, and by filtration treatment, obtaining liquid zero pour is subzero 6 ℃ biofuel.
(embodiment 4)
Basic identical among the method for the reduction freezing point of biodiesel of present embodiment and the embodiment 3, difference is; The zero pour of the biofuel of step described in 1. is 8 ℃, and preheating temperature is 60 ℃; Step 2. in rate of cooling during crystallisation by cooling be 2 ℃/min, stirring velocity is 15 rev/mins, final freezing and crystallizing temperature is 7 ℃; Step 3. growing the grain temperature is 7 ℃, and stirring velocity is 15 rev/mins, and rearing crystal time is 24 hours; The 4. middle filter pressure of step is 1.5Mpa, and filtration time is 15 minutes.
The zero pour of the biofuel that the method for present embodiment obtains is 0 ℃.
(embodiment 5)
Basic identical among the method for the reduction freezing point of biodiesel of present embodiment and the embodiment 3, difference is: the zero pour of the biofuel of step described in 1. is 5 ℃, and preheating temperature is 50 ℃; Step 2. in rate of cooling during crystallisation by cooling be 1.5 ℃/min, stirring velocity is 12 rev/mins, final freezing and crystallizing temperature is 0 ℃; Step 3. growing the grain temperature is 0 ℃, and stirring velocity is 13 rev/mins, and rearing crystal time is 15 hours; The 4. middle filter pressure of step is 1.0Mpa, and filtration time is 14 minutes.
The zero pour of the biofuel that the method for present embodiment obtains is subzero 2 ℃.
(embodiment 6)
Basic identical among the method for the reduction freezing point of biodiesel of present embodiment and the embodiment 3, difference is: the zero pour of the biofuel of step described in 1. is 10 ℃, and preheating temperature is 55 ℃; Step 2. in rate of cooling during crystallisation by cooling be 1.2 ℃/min, stirring velocity is 13 rev/mins, final freezing and crystallizing temperature is 2 ℃; Step 3. growing the grain temperature is 2 ℃, and stirring velocity is 10 rev/mins, and rearing crystal time is 12 hours; 4. step adopts belt vacuum filter to carry out filtration treatment for the material after growing the grain is handled, and the vacuum tightness of belt vacuum filter is 400Pa, and filtration time is 15 minutes.
The zero pour of the biofuel that the method for present embodiment obtains is subzero 5 ℃.
(embodiment 7)
Basic identical among the method for the reduction freezing point of biodiesel of present embodiment and the embodiment 6, difference is: step 4. in the vacuum tightness of belt vacuum filter be 350Pa, filtration time is 30 minutes.
The zero pour of the biofuel that the method for present embodiment obtains is subzero 5 ℃.
(embodiment 8)
Basic identical among the method for the reduction freezing point of biodiesel of present embodiment and the embodiment 6, difference is: step 4. in the vacuum tightness of belt vacuum filter be 450Pa, filtration time is 40 minutes.
The zero pour of the biofuel that the method for present embodiment obtains is subzero 8 ℃.
(embodiment 9)
As shown in Figure 2, the method for the reduction freezing point of biodiesel of present embodiment has following steps:
1. being that 15 ℃ biofuel is a raw material with zero pour, is that medium carry out preheating with steam with this biofuel in plate-type heat exchanger, and preheating temperature is 55 ℃;
2. with step 1. the biofuel after the preheating in the crystallizer of band whipping appts and spiral coil cooling tube and cooling jacket, carry out crystallisation by cooling, and make the high-solidification point substance crystallization that comprises various saturated fatty acid methyl esters in the described biofuel; Rate of cooling during crystallisation by cooling is 1 ℃/min, and stirring velocity is 12 rev/mins, and final crystallisation by cooling temperature is subzero 4 ℃;
3. with step 2. the material behind the crystallisation by cooling place the maturator growing the grain of band whipping appts and spiral coil cooling tube and cooling jacket to handle, crystal is grown up; The growing the grain temperature is subzero 4 ℃, and stirring velocity is 11 rev/mins, and rearing crystal time is 12 hours;
4. the material after growing the grain being handled adopts membrane pressure filter to carry out filtration treatment, and filter pressure is 0.2Mpa, and filtration time is 13 minutes, by filtration treatment, obtains liquid biofuel crude product.
5. the biofuel crude product of the liquid state that step is obtained in 4. repeat above-mentioned steps 1. to step 4. once, be subzero 9 ℃ biofuel and obtain liquid zero pour.
(embodiment 10)
Basic identical among the method for the reduction freezing point of biodiesel of present embodiment and the embodiment 9, difference is: the biofuel crude product of the liquid state that step obtains step in 4. in 5. repeats above-mentioned steps 1. to step 4. twice, and the zero pour of the biofuel that obtains is subzero 12 ℃.
(embodiment 11)
The method of the reduction freezing point of biodiesel of present embodiment has following steps;
1. be that 12 ℃ biofuel is a raw material with zero pour, this biofuel is carried out crystallisation by cooling in the crystallizer of band whipping appts and spiral coil cooling tube and cooling jacket, and make the high-solidification point substance crystallization that comprises various saturated fatty acid methyl esters in the described biofuel; Rate of cooling during crystallisation by cooling is 1 ℃/min, and stirring velocity is 10 rev/mins, and final crystallisation by cooling temperature is subzero 5 ℃;
2. the material behind the crystallisation by cooling adopts membrane pressure filter to carry out filtration treatment, and filter pressure is 0.2Mpa, and filtration time is 13 minutes, by filtration treatment, obtains liquid biofuel crude product.
3. the biofuel crude product of the liquid state that step is obtained in 2. repeats above-mentioned steps 1., 2. once, is subzero 9 ℃ biofuel and obtain liquid zero pour.
(embodiment 12)
Basic identical among the method for the reduction freezing point of biodiesel of present embodiment and the embodiment 11, difference is: the biofuel crude product of the liquid state that 3. step obtains step in 2. repeat above-mentioned steps 1., 2. three times, the zero pour of the biofuel that obtains is subzero 10 ℃.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (9)
1, a kind of method that reduces freezing point of biodiesel is characterized in that: have following steps: 1. be raw material with the biofuel, earlier described biofuel cooled off, make the higher component crystallization of zero pour in the described biofuel; 2. carry out solid-liquid separation then, isolate crystal composition, and obtain liquid subzero biofuel.
2, the method for reduction freezing point of biodiesel according to claim 1 is characterized in that; Before to described biofuel crystallisation by cooling, also has the step of preheating.
3, the method for reduction freezing point of biodiesel according to claim 1 and 2 is characterized in that: before carrying out solid-liquid separation, also have growing the grain and handle the step that crystal is grown up.
4, the method for reduction freezing point of biodiesel according to claim 1 and 2, it is characterized in that: behind the liquid composition heat temperature raising that obtains after the solid-liquid separation, repeat again above-mentioned steps 1., 2. one or many, and obtain more subzero biofuel.
5, the method for reduction freezing point of biodiesel according to claim 1 and 2 is characterized in that: the solid-liquid separation method of above-mentioned steps described in 2. is for adopting filtering mode.
6, the method for reduction freezing point of biodiesel according to claim 5 is characterized in that: described preheating is for being that medium heats with steam in plate-type heat exchanger; Described crystallisation by cooling is to carry out in the crystallizer of band whipping appts and spiral coil cooling tube and cooling jacket; Described growing the grain is treated in the maturator of band whipping appts and spiral coil cooling tube and cooling jacket and carries out.
7, the method for reduction freezing point of biodiesel according to claim 6 is characterized in that: the preheating temperature of described preheating is 45 ℃ to 60 ℃; Rate of cooling during described crystallisation by cooling is 1 ℃/min to 2 ℃/min, and stirring velocity is 10 rev/mins to 15 rev/mins, and final crystallisation by cooling temperature is subzero 5 ℃ to 7 ℃ above freezing; The growing the grain temperature that described growing the grain is handled is subzero 5 ℃ to 7 ℃, and stirring velocity is 10 rev/mins to 15 rev/mins, and rearing crystal time is 8 hours to 24 hours.
8, the method for reduction freezing point of biodiesel according to claim 5 is characterized in that: described filtration is to adopt membrane pressure filter or belt vacuum filter to filter.
9, the method for reduction freezing point of biodiesel according to claim 8, it is characterized in that: when using membrane pressure filter: filter pressure is 0.2Mpa to 1.5Mpa, filtration time is 13 minutes to 15 minutes, when using belt vacuum filter: vacuum tightness is 350Pa to 450Pa, and filtration time is 15 minutes to 40 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101620702A CN100460484C (en) | 2006-12-12 | 2006-12-12 | Process for lowering solidifying point of bio-diesel oil |
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| CNB2006101620702A CN100460484C (en) | 2006-12-12 | 2006-12-12 | Process for lowering solidifying point of bio-diesel oil |
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| CN1962825A true CN1962825A (en) | 2007-05-16 |
| CN100460484C CN100460484C (en) | 2009-02-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760263B (en) * | 2010-01-06 | 2012-09-05 | 江苏永林油脂化工有限公司 | Method for reducing freezing point of biodiesel |
| CN104017655A (en) * | 2013-03-03 | 2014-09-03 | 河源市汇盛生物科技有限公司 | Method for reducing solidifying point of biodiesel |
| CN108003950A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | Composition and Dresel fuel compositions and their preparation method with diesel oil abrasion resistance |
| CN109628231A (en) * | 2018-11-14 | 2019-04-16 | 浙江东油能源科技有限公司 | A kind of device and preparation method thereof preparing low freezing point biodiesel using Terahertz Technology |
| CN111234927A (en) * | 2020-02-12 | 2020-06-05 | 常州市金坛区维格生物科技有限公司 | Separation method of low-freezing-point biodiesel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004217776A (en) * | 2003-01-15 | 2004-08-05 | Susumu Yoshida | Bio-diesel refining unit |
| CN1238468C (en) * | 2003-12-31 | 2006-01-25 | 中国农业科学院油料作物研究所 | Production method of biodiesel oil using high acid ralue animal and vegetable grease |
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2006
- 2006-12-12 CN CNB2006101620702A patent/CN100460484C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760263B (en) * | 2010-01-06 | 2012-09-05 | 江苏永林油脂化工有限公司 | Method for reducing freezing point of biodiesel |
| CN104017655A (en) * | 2013-03-03 | 2014-09-03 | 河源市汇盛生物科技有限公司 | Method for reducing solidifying point of biodiesel |
| CN108003950A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | Composition and Dresel fuel compositions and their preparation method with diesel oil abrasion resistance |
| CN108003950B (en) * | 2016-10-28 | 2020-04-24 | 中国石油化工股份有限公司 | Composition with diesel anti-wear properties, diesel composition and preparation method thereof |
| CN109628231A (en) * | 2018-11-14 | 2019-04-16 | 浙江东油能源科技有限公司 | A kind of device and preparation method thereof preparing low freezing point biodiesel using Terahertz Technology |
| CN111234927A (en) * | 2020-02-12 | 2020-06-05 | 常州市金坛区维格生物科技有限公司 | Separation method of low-freezing-point biodiesel |
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| CN100460484C (en) | 2009-02-11 |
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